John desmond



(Model.)

J. DESMOND.

STEAM INJEGTOR.

No. 392,544. Patented Nov. 6, 1888..

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. NITED STATES PATENT lrricie,

JOHN DESMOND, OF DETROIT, MICHIGAN, ASSIGNOR TO NORMAN LITTLE HAYDEN AND JOHN NORMAN DERBY, OF SAME PLACE.

STEAM-INJECTOR.

SPECIFICATION forming part of Letters Patent No. 392,544, dated November 6, 1888.

Application filed September (i, 1888. Serial No. 284,684. (Model.)

To @ZZ whom, t may concern,.-

Be it known that I, JOHN DEsMoND, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Steam-Injectors, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention pertains to certain new and useful improvements in steam-injectors, having for its object the provision of new and improved simple and highly-efcent means for readily and easily creating a vacuum in the water-supply chamber for rapidly elevating or raising the water thereinto, and also the production of an injector having but few parts, which in the main are immovable.

The invention also comprises the details of construction, combination, and arrangement of parts, substantially as hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a vertical longitudinal sectional view of my improved injector. Fig. 2 is a horizontal sectional view thereof on the line w cv, Fig. 1.

Referring to the drawings, A designates the tubular casting or casing, provided, as customary, with the steam-inlet arm or branch a, the water-inlet arm c, the outlet-arm c2, and the delivery-arm c, to each of which is connected the ordinary pipe by means of pipe-couplings.

(Not shown.) The main or body portion of casing A is divided by walls b b into inner exhaust and overflow chambers, bl b3, which open into and are surrounded by the main overliowchamber B. In an aperture in the upper portion of wall b rests a valve, C, the stem of jacent parallel sides of Walls Z b and out through arm a2.

D is the ordinary steam-inlet jet sccuredin arm a, and having its inner end projecting into watonsupply chamber e. The lifting-tube E is screwed or otherwise secured in an aperture of internal wall, c, and its inner end extends into exhaust-chamber Zr", into which also projects the end of combining-tube F, screwed into wall b of chamber b3, and projecting across the central portion of the overflow-chamber B.

G is the delivery-tube screwedinto or made to form a part of the end plug, g, the :aperture of which coincides with that of said tube.

From the foregoing description it will be seen that steam on being admitted to the inj ector will first pass out of the lifting-tube into the first or exhaust chamber bg, and, raising valve C, will pass o ut through the overflow, thus creating a vacuum in the water-supply chamber, which will immediately effect the lifting of the water thereinto,and the same will be forced with the steam through the series of tubes to the boiler. At Yfirst some steam and water will pass into both the chambers b2 b, and will immediately raise their respective Valves and escape into the overflow. The opening of both valves from the inner chambers into the main overflow-chamber will the more readily ei'lect a vacuum in the water-supply chamber, and thus cause the immediate establishment of the jet which will pass to the boiler.

I claim as my invention 1. As an improvement in steam-injectors, the herein-described injector having a main overflow-chamber, as D, and inner exhaust and overiiow chambers, b2 b, located within and surrounded by said main overflow-chamber,'with which they communicate, said exn haust and overflow chambers b2 b3 being formed as part of the casing and independent of said l' main OVcrHOW-chamber, substantially as set forth.

2. As an improvement in steaminjectors, the injector herein described, having the main overflow-chamber, as B, the inner exhaust and overflow chambers, b2 b3, located within and surrounded by said main overlioW-chamber, and provided with openings or apertures, one being larger than the other, and the valves designed to it in said openings, said exhaust and overiiow chambers b b" being formed as part ICO of the casing and independent of said main overioW-chamber, as set forth.

3. As an improvement in steam-injectors, the injector herein described,having the main overflow-chamber B, the two internal walls having adjacent parallel sides and provided with openings or apertures, one being larger than the other, and the valves designed to lit in said openings, substantially as described.

4. As an improvement in steaminjectors, the injector herein described, having the two internal walls, forming inner exhaust and overiiow chambers7 b2 b3, and provided with coincident apertures, and the combiningtube iitted in one of said walls and projecting snugly through the aperture of the other adjacent wall, substantially as described.

5. The herein-described improved injector, comprising the casing having the main overflow-chamber B, the inner exhaust and overiow chambers, b2 b3, having upper openings, the valves designed to rest in said openings, the steam-inlet jet, the lifting-tube, the conibiningftube connectingsaid inner exhaust and overiiow chambers, the deliverytube,and the end plug to which said latter tube is secured, all constructed and arranged substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

. JOHN DESMOND.

Witnesses:

W. ToWNsEND, JOHN N. DERBY. 

